800-543-9038
USA
866-805-7089
CANADA
203-791-8396
LATIN AMERICA / CARIBBEAN
24
EFB24 N4, EFB24-S N4, EFX24-S N4(H)
NEMA 4, On/Off, Spring Return, 24 V
Accessories
IND-EFB
Damper position indicator
KH-EFB
Crank arm
K9-2
Universal clamp for up to 1.05” diameter jackshafts
Tool-07
13 mm wrench
ZG-EFB
Crank arm adaptor kit
Note: When using EFB24 N4, EFB24-S N4, EFX24-S N4(H) actuators, only use accessories
listed on this page.
For actuator wiring information and diagrams, refer to Belimo Wiring Guide.
Typical Specification
On/Off spring return damper actuators shall be direct coupled type which require
no crank arm and linkage and be capable of direct mounting to a jackshaft up to a
1.05” diameter. The actuators must be designed so that they may be used for either
clockwise or counterclockwise fail-safe operation. Actuators shall be protected
from overload at all angles of rotation. If required, two SPDT auxiliary switch shall
be provided. Actuators with auxiliary switches must be constructed to meet the
requirements for Double Insulation so an electrical ground is not required to meet
agency listings. Actuators shall be cULus Approved and have a 5 year warranty, and be
manufactured under ISO 9001 International Quality Control Standards. Actuators shall
be as manufactured by Belimo.
Wiring Diagrams
1
Provide overload protection and disconnect as required.
2
CAUTION
Equipment Damage!
Actuators may be connected in parallel.
Power consumption and input impedance must be observed.
3
Actuators may also be powered by 24 VDC.
4
For end position indication, interlock control, fan startup, etc., EFB24-S N4
and EFX24-S N4(H) incorporates two built-in auxiliary switches: 2 x SPDT,
3A (0.5A) @250 VAC, UL Approved, one switch is fi xed at 10°, the other is
fi xed at 85°.
Meets cULus requirements without the need of an electrical ground
connection.
WARNING
Live Electrical Components!
G
During installation, testing, servicing and troubleshooting of this product, it may be
necessary to work with live electrical components. Have a qualifi ed licensed electrician or other
individual who has been properly trained in handling live electrical components perform these
tasks. Failure to follow all electrical safety precautions when exposed to live electrical compo-
nents could result in death or serious injury.
1 Common
2 + Hot
1
2
24 VAC Transformer
EFB24 N4, EFB24-S N4
EFX24-S N4
Line
Volts
3
W
063_EFB
(X
)_N4
On/Off wiring
EFB24-S N4
EFX24-S N4
85°
W064_EFB
(X
)24_-S_N4_1
1
Auxiliary Switches
G
K-AF-NF N4H 24V h
ea
te
r
NEMA 4 Heater
N40103 - 09/11 - Subject to change.
© Belimo
Aircontrols (USA),
Inc.
